Improved pipe-cutter



T. S. FOSTER. PIPE CUTTER.

N0. 65,066. Patented May 28, 1867.

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THEODORE s. FOSTER, OF FITGHBURG, MASSACHUSETTS, ASSIGNOR To HIMSELF AND JOHN P. 'SABIN, OF .THE SAME PLACE.

Letters Patent No. (i5,l)66, dated May 28, 1867.

IMPROVED PIPE-CUTTER.

TO-ALL WHOM IT MAY CONCERN:

Be it known thnt I, THEODORE S. FOSTER, of Fitchburg, in the county of Worcester, and State of Massachusetts, have invented certain new and usefula-improvementsin Pipe-Cutters for metallic pipes or tubes; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents an elevation of the pipe-cutter. I

Figure 2 is a plan; and

Figure 3 represents a longitudinal vertical section of the same.

The same letters refer to the same parts in the separate figures.

The cutter, as now generally used, is of circular form, and attached by a pin to a movable block or jaw, which again is acted upon by the feeding-screw. Thus the pin has to bear the whole pressure, and as both pin and cutter are made of small dimensions, they soon wear out, and require to be frequently replaced. Furthermore, the angular double bend or claw, against which'the pipe is pressed, is made of soft iron, which, by the working, slipping, and twisting of the pipe, becomes first indented, then hollowed out and so much worn as to make the operation tedious agd-uncertain, and soon rendering the tool useless. The object of my invention is toovercome these difi'ic'ulties, to simplify the tool, to make a strpng and substantial cutter or cutting-knife, to make the feeding-screw act directly on the strongest part of the knife, 'to protect the angular bend or claw, making the tool lighter, more handy, durable, and of a more suitable form.

My invention consists in a cutting-knifevibrating between the .two sides which form the bend or claw, on a pivot placed below a line drawn from the cutting edge to the point of the feeding-screw. The knife is so constructed that the cutting edge has the required thickness for cutting, and increases in thickness so as to present a broad surface for the feeding-screw to act upon, thus giving the knife the greatest possible strength. The cutting edge and back are curved, so as to adapt it to the diiferent-sized pipes. The mode of hanging the knife makes it easily detachable for the purpose of grinding or renewing. The invention also consists in the employment of two or more. friction-rollers, made "of iron,'and oase-hardcnedpor Of tempered steel, with an annular groove to receive the burr caused by the cut. The said friction-rcllersare placed in a. position so as to bear against the pipe; receive all the pressure and working of the pipe, and thus relieve the claw.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

In figs. 1, 2, and? a represents thclbend'or jaw, g the stock, forming also the nutfor the feeding-scrcwf. 6 is the cutting-knife, formed with a convex cutting e go, 2', and a curved back, It, and is pivoted to the claw a, as shown c c' are friction-rollers with a hollow annular groove in" each, and rotate upon pins, (1 d, at the end of the claw. -f is the feeding-screw, with a handle, It, at the end of its stem.

I claim as my invention, and desire to secure by Letters -Patent I I I 1. The knife" 6, constructed as described, and attached to the claw, substantially in the manner and for the purpose above specified. V

2. The combination of the knife 6 with the friction-rollers, or their-equivalent, and the feeding-screw, as above described.

In testimony whereof I have signed my name to this specification in the presencc of .two subscribing witnesses.

THEODORE s; FOSTER. 1.5.

' Witnesses:

Enwn. I. Annnsws, M. S. G; wILDE. 

